Gabapentin completely eliminated my social anxiety. It also seemed to give me a cognitive boost, which increased fluidity in social situations. It allowed me to make some moves in my life that I would not have executed otherwise. 6 years later, however, I am back to square one.
When I got a prescription, I think it was 300 mg per day. I am now on 300 mg 5 times per day. I have only ever taken capsules.